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3 years ago

Please HELP

Mathematics

1 answer:

eduard3 years ago

7 0

Answer:

Let B = (x, y)

Given A = (8, 9)

$distance = \sqrt{(x_1 - x_2)^2 + (y_1-y_2)^2} \\\\10 = \sqrt{(x_1 - 8)^2 + (y_1-9)^2}$

option 3

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6th grade math please help because my grade went down.. and ion got time to be

son4ous [18]

Answer:

first you subtract 5 from both sides

your left with 3x=11

divide by 3 on both sides

x=3.666 repeating

Step-by-step explanation:

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3 years ago

Jake ate 4½ pounds of candy during the week after Halloween. How much candy did he eat per day on average.

ElenaW [278]

Answer: 9/14 of a pound each day.

Step-by-step explanation:

We can convert the mixed fraction into an improper fraction:

4 1/2 → 9/2

Now we divide by 7, since there are 7 days in a week:

9/2 ÷ 7

When we divide, by a number, it can be placed in the denominator:

9/2*7 = 9/14

There's no other way to simplify it, so that's our final answer.

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3 years ago

Read 2 more answers

3. A model rocket is launched from the ground with an initial velocity of 352 ft/sec.

Hoochie [10]

Answer:

e. It will take 11 seconds to reach the maximum height of 1,936 feet.

f. It will take 22 seconds to return to the earth.

Step-by-step explanation:

Given:

Initial velocity $v_0$ = 352 ft/sec

Solving for question e.

To find the time required to reach the maximum height we will use the formula,

$h(t) = -16t^2+v_0t+h_0$ ,

where $v_0$ is the starting velocity

$h_0$ is the initial height.

Using the velocity and starting height from our problem we have,

$h(t) = -16t^2+352t+0$ ,

The path of this rocket will be a downward facing parabola, so there will be a maximum.

This maximum will be at the vertex of the graph.

To find the vertex we start out with $x= \frac{-b}{2a}$ which in our case is,

$x=\frac{-352}{2(-16)}=\frac{-352}{-32}= 11$

So, It will take 11 seconds for the rocket to reach its maximum height.

We will find maximum height using the formula by substituting value of t we get,

$h(11)=-16(11^2)+352(11)+0\\h(11) = -16 \times121+ 352 \times 11 = -1936+3872= 1936 \ ft$

Hence the maximum height will be $1936 \ ft$

Now Solving for question f.

To find the time required for rocket to reach earth.

We will set our formula to 0 to find the time.

$0= -16t^2+352t+0\\-16t(t-22)=0$

Using the zero product property, we know that either -16t = 0 or t - 22 = 0. When -16t = 0 is at t = 0, when the rocket is launched. t - 22 = 0 gives us an answer of t = 22.

So the rocket reaches the Earth again at 22 seconds.

8 0

3 years ago

How many ways are there to make 50 cents in change using only pennies,

mrs_skeptik [129]

The many permutations of the amount of change that may be obtained by solely utilizing pennies, nickels, dimes, and quarters

(50 pennies45 cents, 1 nickel40 pennies, 2 nickels40 pennies, 1 dime35 penny, 3 nickels35 pennies, 1 nickel,...)

In all, there are 48 of them. This is further explained below.

<h3>What are pennies?</h3>

Generally, The cent is the name given to the coin that is worth one cent in the United States. It is also often referred to as the "penny." One cent is equivalent to one-hundredth of a United States dollar. Since the removal of the half-cent in 1857, it has held the position as the United States currency unit with the smallest value printed on its face.

In conclusion, The different ways that 50 cents in change using only pennies, nickels, dimes, and quarters are

(50 pennies45 pennies, 1 nickel40 pennies, 2 nickels40 pennies, 1 dime35 penny, 3 nickels35 pennies, 1 nickel,...)

They are 48 in total